Transferring a radio bearer configuration

A method of transferring a radio bearer configuration, the method comprising a source fifth-generation base station:

• applying at least one radio bearer configuration to configure at least one radio bearer for communication of Protocol Data Units between the source fifth-generation base station and a user equipment;
• sending a Handover Required message including a Handover Preparation Information message for the user equipment to an Access and Mobility Management Function, the Handover Preparation Information message including a sourceRB-ConfigIntra5GC field that includes the at least one radio bearer configuration for communication of Protocol Data Units between the source fifth-generation base station and the user equipment, the at least one radio bearer configuration including a Protocol Data Unit (PDU) Session Identity and a radio bearer identity, the PDU Session Identity being different than the radio bearer identity;
• in response to sending the Handover Required message, receiving a Handover Command message from the Access and Mobility Management Function that includes an Evolved Universal Terrestrial Radio Access RRC message including a radio bearer configuration based in part on the at least one radio bearer configuration for communication of Protocol Data Units between the source fifth-generation base station and the user equipment;
• and
• transmitting a Radio Resource Control message including the Evolved Universal Terrestrial Radio Access Radio Resource Control message to the user equipment that is effective to cause the user equipment to perform a handover to a target Evolved Universal Terrestrial Radio Access base station.

A method of transferring a radio bearer configuration, the method comprising a user equipment:

• receiving at least one radio bearer configuration to configure at least one radio bearer for communication of Protocol Data Units between a source fifth-generation base station and the user equipment, the at least one radio bearer configuration including a data radio bearer (DRB) identity and a signaling radio bearer (SRB) identity;
• receiving a Radio Resource Control message including an Evolved Universal Terrestrial Radio Access Radio Resource Control message from the source fifth-generation base station, the Evolved Universal Terrestrial Radio Access Radio Resource Control message including at least one Radio Link Control configuration associated with the at least one radio bearer;
• associating the at least one Radio Link Control configuration to the at least one radio bearer of the at least one radio bearer configuration based on the at least one Radio Link Control configuration and the at least one radio bearer configuration having the same radio bearer identity;
• based on the received Radio Resource Control message, configuring for a handover to a target Evolved Universal Terrestrial Radio Access base station;
• and
• transmitting an Evolved Universal Terrestrial Radio Access Radio Resource Control response message to the target Evolved Universal Terrestrial Radio Access base station.